Table 1
Properties of the observed lines.
| Molecule | Transition | νrest | Eup | Sijμ2 | Beam | rms | Fint | NX |
|---|---|---|---|---|---|---|---|---|
| (GHz) | (K) | (D2) | (′′) | (mJy beam−1) | (mJy km s−1) | (1014 cm−2) | ||
| 12CO | 2−1 | 230.538000 | 17 | 0.02 | 0.14 × 0.11 | 1.2 | – | – |
| o-H2CO | 31,2−21,1 | 225.697775 | 33 | 43.5 | 0.17 × 0.14 | 1.4 | 622 ± 32 | 0.27−2.98 |
| CS | 5−4 | 244.935556 | 35 | 19.1 | 0.16 × 0.13 | 0.6 | 920 ± 14 | 0.20−0.70 |
| CN | 2−1, J =  , F =  |
226.665956 | 16 | 4.2 | 0.17 × 0.14 | 0.8 | 295 ± 18 | 0.17−1.06 |
2−1, J =  , F =  |
226.663692(b) | 16 | 1.2 | |||||
2−1, J =  , F =  |
226.874781 | 16 | 6.8 | 0.17 × 0.14 | 1.3 | 754 ± 29 | 0.18−1.10 | |
2−1, J =  , F =  |
226.874190(b) | 16 | 4.2 | |||||
2−1, J =  , F =  |
226.875896(b) | 16 | 2.6 | |||||
| 34SO2 | 42,2−31,3 | 229.857618 | 19 | 4.6 | 0.17 × 0.14 | 0.8 | <18 | |
| SO2 | 115,7−124,8 | 229.347630 | 122 | 3.1 | 0.17 × 0.14 | 0.9 | (24 ± 20) | <1.60−4.48 |
| 54,2−63,3 | 243.087647 | 53 | 0.7 | 0.16 × 0.13 | 0.8 | (22 ± 19) | <1.75−11.75 | |
| 52,4−41,3 | 241.615796 | 24 | 5.7 | 0.16 × 0.13 | 0.9 | (42 ± 21) | <0.16−2.58 | |
| HDO | 31,2−22,1 | 225.896720 | 168 | 0.7 | 0.17 × 0.14 | 0.8 | <18 | <0.09−0.70 |
| 21,1−21,2 | 241.561550 | 95 | 0.4 | 0.16 × 0.13 | 0.9 | <21 | <0.24−0.63 | |
| CH3OH | 3−2,2−4−1,4 | 230.027060 | 40 | 0.7 | 0.17 × 0.14 | 0.9 | <20 | |
| 50,5−40,4 | 241.791431 | 35 | 4.0 | 0.16 × 0.13 | 0.9 | (26 ± 21) | <0.55−10.86 |
Notes. Columns are: molecular species, transition, frequency at rest frame ((b) = blended line), upper-level energy, line strength, beam size, channel rms, flux integrated over the main region (see text), column density. Errors on the flux have 1σ confidence. Parentheses denote a flux above 1σ but below 3σ confidence. The limits on the column density are derived assuming Tex between 30 and 300 K.
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